Rinse and trim spinach. Peel and finely chop onion. In a large skillet, sauté onion in hot oil. Add spinach, still dripping wet, and cook until spinach wilts and all liquid evaporates, about 5 minutes. Season with salt and pepper.

2.

Season fish with salt, pepper and lemon juice and place in a greased baking dish. Mix cheese with creme fraiche. Spread spinach over fish and top with cheese mixture. Sprinkle with almonds. Bake on the center rack of a preheated oven at 225°C (approximately 425°F), 12-15 minutes.